Grav Box vs Water Simulator
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Grav Box
Control gravity with a tap and hold to manipulate objects. Customize their appearance, explore dynamic physics, and engage in arcade challenges with leaderboards and achievements.
- Tap and hold to control gravity
- Customize grav colors and emojis
- Dynamic backgrounds and physics effects
- Arcade mode with achievements
- Global leaderboards
- In-game events like black holes
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Grav Box places gravity at your fingertips. Tap and hold on the screen to control the gravitational field around your gravs and manipulate them in limitless ways. Customize your entire experience by setting gravs to any color or emoji, explore dynamic backgrounds and physics effects, and even modify the effects of gravity itself. With custom preferences set, head to the arcade to unlock achievements and compete against global leaderboards. Be prepared for black holes, gravitational shifts, and many other in-game events that will impact your gameplay.
Water Simulator
Experience realistic fluid physics with particle simulation. Tap to create streams, tilt your device to control gravity, and explore various fluid types. Offers a relaxing and immersive visual experience.
- Realistic fluid physics simulation
- Touch interaction for particle spawning
- Gyroscope control for gravity direction
- Multiple fluid presets (water, honey, oil, mercury, lava)
- Haptic feedback for particle interaction
- Real-time FPS display
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Turn your screen into a little fluid playground. Tap to create water particles and watch them gather, flow, splash, and bounce through a touch-responsive physics simulation. POUR, WATCH, EXPERIMENT Start with the basic water simulation and 50 particles. Touch the screen to add a stream, watch how particles interact, and clear the scene when you want to begin again. Haptic feedback and an FPS readout add another layer to the experience. CHANGE THE WAY LIQUID MOVES An optional Pro subscription unlocks gyroscope gravity controls, additional fluid presets, and physics customization. Try water, honey, oil, mercury, or lava-inspired settings, then adjust available color, viscosity, surface tension, bounce, and particle-size controls. • Tilt your device to change gravity with Pro • Compare the feel of thick and thin simulated liquids • Try different particle colors and sizes • Change the physics and observe the result • Use the sandbox at your own pace, without scores or deadlines FREE AND PRO Basic water and the 50-particle tier are free to try. Pro removes the free-tier particle cap and unlocks the listed customization features; practical performance still depends on your device and simulation settings. Plans and local pricing appear before purchase. Subscriptions renew automatically unless canceled through your Apple account settings. A sensory toy for curious hands and a quiet pause. The named presets are simulated particle behaviors, not actual liquids or a laboratory measurement tool. No claim is made to diagnose or treat ADHD, anxiety, or any other condition. Privacy: https://apple.caserlegal.com/privacy.html Terms: https://apple.caserlegal.com/terms.html Support: https://apple.caserlegal.com/support.html EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Grav Box at 96% against Water Simulator's 0%. Grav Box also leads on rating (4.8 vs 3.0) and ratings volume (26 vs 2). Water Simulator's advantage is ads (none vs shown) and update cadence (every 5 days vs every 5 months). On price, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Grav Box sells 10 one-off in-app purchases and Water Simulator sells 3 in-app purchases, starting at $0.29 per 7 days. Whichever you choose, the download price is not the number that matters.
Grav Box holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Grav Box has 26 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 96% of Grav Box's written reviews are positive against 0% of Water Simulator's.
Grav Box ships an update every 5 months, Water Simulator every 5 days. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.
| Parameter | Grav Box | Water Simulator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (26 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 96.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 26 — better | 2 |
| Update frequency | Every 5 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 10 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Gianluca Capraro | Adam Doherty |
Customer experience
Grav Box
Water Simulator
In-app purchases
Grav Box
- Gold Blocks (100) Pack$0.99
- Light Portal$0.99
- Dark Portal$0.99
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- Grav Box$0.99
- Midnight$0.99
- Daybreak$0.99
- Beach$0.99
- Jungle$0.99
- Mist$0.99
- Gold Blocks (1000) Pack$4.99
Water Simulator
- Weekly$0.297 Days
- Monthly$0.991 Month
- Yearly$9.991 Year









